JPH0791508A - Drive system analysis system - Google Patents

Abstract

PURPOSE:To easily make pulley and belt models following belt type by specifying them as parameter input, and to facilitate a model changeover, etc., due to parametric alteration by storing attributes of belt and pulley and their connection information. CONSTITUTION:Mechanical characteristic, friction coefficient, reference shape parameter, etc., of respective materials and parts are stored in a material/part data base. Input information is then stored in a data memory portion 4, such as position and size of belt and pulley models, model mutual connection and drive conditions, and respective calculation results are also stored. In a load model preparation portion 5-2, respective part elements constituting a drive system and load elements such as friction, inertia and viscosity are inputted as parameter. In a belt analysis portion, calculation is executed of belt overall length, pulley move, belt partitioning and belt winding end. The calculation results are processed in a belt result display portion 7-2, and then are displayed in a display device 1, such as CRT.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive system analysis system for designing an apparatus having a medium conveying mechanism such as a financial automatic machine and a printer, and a drive system for other mechatronic products.

[0002]

2. Description of the Related Art Mechatronics products such as devices having a mechanism for transporting media and the like are equipped with a drive system using an endless belt. As a system for supporting the design of such a drive system, a drive system transmission network creation and load analysis C
There is an AE system (see Japanese Patent Laid-Open No. 4-174080). In such a drive design, the belt type and width can be calculated manually from the belt specifications (standard transmission capacity, allowable tension, etc.) based on the required transmission torque of the drive system, operating conditions such as the number of revolutions, and the number of pulley teeth. I was looking for a belt.

Further, as shown in FIG. 2, the total belt length has also been calculated manually from the arrangement of the drive shaft, the transmission shaft, the pulley diameter (reduction ratio), and the like. That is, first, in FIG. 2, from the center coordinates of the circles P1 and P2, which are pulley models, and the diameter of the pitch circle, coordinate values (X1, Y1) of the intersection points of the belt and the pulley
(X2, Y2) and the like are calculated (step S71). Then, the length of the line segment L1 or the like is calculated from these intersection point coordinate values (step S72). Also, the center coordinates of the circle P1 and L
1 and L2 intersection point coordinate values (X1, Y1), (X3, Y3)
Then, the angle θ1 of the arc is calculated (step S73). Then, the length of the circular arc is calculated from the pitch radius and the angle of the circular arc (step S74). Similarly, the lengths of all line segments and arcs in the belt drive system are calculated (step S75).
Finally, the lengths of all line segments and arcs are summed to calculate the belt total length (step S76).

In such a belt total length calculation, it is complicated to obtain a calculation formula when the belt drive system has a complicated shape, and it takes a very long time for manual calculation. Therefore, as shown in FIG. 3, calculation is also performed using a drawing function and a line length measuring function of a CAD system or the like. That is, first, CA
The center coordinates and the pitch circle diameter are designated by D, and a circle is input (step S81). Next, the tangent line connecting each circle is input (step S82). Then, the division function divides the circle at the intersection of the circle and the tangent line to create an arc (step S83). Finally, the total length is measured by the line length measuring function (step S84).

[0005]

However, the above-mentioned conventional technique has the following problems. As described above, if the number of pulleys in the belt drive system becomes large and the belt calculation becomes complicated, the manual calculation method as shown in FIG. 2 and the CAD system method as shown in FIG. Therefore, there is a problem that it takes a very long time to calculate and a calculation error easily occurs. Moreover, since the standard length of the timing belt is fixed, it is necessary to arrange the pulleys according to the standard length. Therefore, it may be necessary to change conditions such as pulley position, pulley diameter, belt type (flat belt, timing belt, etc.). In such a case, the manual calculation method requires recalculation, and the calculation by the CAD system requires re-inputting the center coordinates of the pulley and the pitch circle diameter. Further, when the belt is doubly hung on the same pulley, the calculation becomes more complicated.

Furthermore, in order to prevent tooth skipping and ensure a sufficient belt life, the number of teeth wound around the pulley is calculated,
It is necessary to do it with more teeth than necessary. Such a calculation must be calculated based on the length of the belt pitch line and the pulley pitch diameter. Therefore, it is necessary to input the belt in the form of a straight line or an arc having no thickness in order to obtain it by the input by the CAD system. Also,
It was necessary to input the pulley shape as the pitch diameter. Therefore, the belt length calculation model is input as a shape different from the actual shape.

On the other hand, in order to obtain the load of the drive system, physical characteristics such as the moment of inertia are required, which requires an accurate shape of parts as shown in FIG. Therefore, there is a difference between the input model and the belt calculation model as described above and the load analysis model. Therefore, there is a problem that the belt calculation model cannot be used as it is as a load analysis model and two models must be prepared.

The present invention is based on the conventional method described above.
"Because it takes time to calculate the belt length calculation formula and the calculation is complicated, it is easy to make calculation mistakes. It takes time to design the pulley arrangement and the number of teeth. Both the belt length calculation model and the load analysis model are common. In order to eliminate the problem that "I can not make it possible.", It has an input / output unit for exclusive use of belt analysis, a model generation unit and a calculation processing unit, and it is possible to easily perform analysis and obtain accurate results. The purpose is to provide a system analysis system.

[0009]

A drive system analysis system according to the present invention comprises a database storing parameters for determining the shapes and materials of belts and pulleys, and belts and pulleys constituting a belt drive system from the database. A parameter input processing unit for inputting the parameter of
It is characterized by comprising an automatic belt generation unit that designates the pulley that is input and arranged by the parameter input unit and automatically applies a belt to the designated pulley to generate a belt drive system. is there.

[0010]

In the drive system analysis system of the present invention, various parameters for determining the shapes and materials of belts and pulleys are prepared as a database, and the parameters of the belt and pulleys are specified by the parameter input section. Is transferred to the data storage unit or the like. This creates an accurate model. Since such a parameter also includes the pitch diameter (the diameter of the pulley pitch circle), the total length of the belt can be calculated using the function of the CAD system. Further, the load can be calculated using the belt pitch, thickness, pitch thickness, tooth height, and the like. Furthermore, when modifying the model from such parameters and connection information such as belts and pulleys,
It is not necessary to modify the belt and pulley individually; if one is modified, the other is automatically modified.

[0011]

The present invention will be described in detail below with reference to the embodiments shown in the drawings. FIG. 1 is a block diagram of an embodiment of a drive system analysis system of the present invention. FIG. 4 is a block diagram showing the overall configuration of a drive system analysis system including the conventional load model analysis system in the system of FIG. The system shown in FIG. 4 includes a display device 1, an input device 2, a material / part characteristic DB 3, a data storage unit 4, a model creating unit 5, an arithmetic processing unit 6, and a result display unit 7. Input device 2
Is composed of a keyboard for inputting numerical values such as shape parameters of belts and pulleys, selection of commands and input of model characteristics, and a mouse for picking elements on the screen.

The display device 1 is composed of a CRT or the like, and displays the shape, position, input information, calculation results, etc. of the created model.
This is for displaying so that it can be visually confirmed. The material / part characteristic DB (database) 3 stores the mechanical characteristics, friction coefficient, standard shape parameter, etc. of each material and part used for calculation as a database. The contents of this database are as shown in FIG. 8 for the belt. The data storage unit 4 stores input information such as the position and size of the input belt and pulley model, connection information between these models, and driving conditions, and also stores each calculation result. The position and dimensions of the belt or pulley model can be determined by specifying the type of belt or pulley when the type is determined.
Corresponding data is read from the component characteristic DB 3 and stored in the data storage unit 4. The connection information between the models is, for example, information indicating that, when there are several pulleys that are hung on a certain belt, they are paired. Such connection information is created by designating a belt with the input device 2 and picking a required pulley. The driving condition is information such as the torque and the rotation speed of the driving device.

In the load model creating section 5-1, each component element such as a shaft, a gear, a roller and the like constituting the drive system and friction,
Load elements such as inertia and viscous load can be input as parameters as in the example of FIG. That is, as shown in FIG. 5, fields for inputting the number of teeth, thickness D1, tooth height D2, etc. are provided, and parameters can be set by inputting numerical values in these fields. In the example shown,
The thickness D1 and the tooth height D2 are shown in the display image of the belt. Further, in the belt model generation unit 5-2, when a belt or a pulley is designated by a belt type or a pulley type such as "MXL" or "XL", these parameters are automatically read from the database. Is input and displayed. In this way, it is possible to easily define the model. For more information on this part,
This will be described with reference to FIG. Further, with respect to the pulley model, parameters can be similarly set by the input panel shown in FIG. 5 (b).

The load analysis unit 6-1 calculates the moment of inertia, the viscous load, and the friction torque based on the input component elements and load elements, connection information and driving conditions, and according to the driving speed from these values. Determine the load torque of the drive shaft. Further, the belt analysis unit 6-2 performs belt total length calculation, pulley movement calculation, belt section calculation, belt winding fraction calculation, and the like. Details of each calculation will be described in the description of FIG.
These calculated results are processed by the load result display unit 7-1 and the belt result display unit 7-2 and displayed by the display device 1 such as a CRT.

An example of the model generator is shown in FIG. In the illustrated example, the generated model is displayed in a perspective view of a three-dimensional model. This model has shaft 41, gear 4
2, a belt 43, a pulley 44 and the like. In the block diagram of FIG. 4, a processing unit surrounded by a double frame is a portion related to the present invention. A more detailed block diagram of the portion related to the present invention is shown in FIG. The belt model generation unit 5-2 specifies various parameters and characteristics of the belt and the pulley. Therefore, the belt model generation unit 5-2 includes a parameter input processing unit 5-2A that sets conditions for creating a model, a belt automatic generation unit 5-2B that creates a belt based on the input pulley, It is equipped with a belt pulley interlocking batch edit processing unit 5-2C for performing various edits. An example of belt model generation in this processing unit is shown in FIG. In the example of FIG. 7, the belt drive system is displayed in a plan view.

The parameter input processing unit 5-2A inputs various dimensional parameters and characteristics represented by the belt type and type as shown in the example of the belt DB in FIG. Therefore, in the case of the belt, first, when the belt type is designated by the parameter input processing unit 5-2A using the input panel shown in FIG. 5, the dimension parameter is automatically set. Also, the standard width, length, etc. can be searched from the DB and set. Further, various physical property values stored in the DB are used for calculation in load analysis, and can also be used as reference values for judging results. Further, the pulley has the same DB as that of the belt. Then, when the pulley type is designated using the input panel shown in FIG. 5, the dimension parameters and the like are automatically set.

FIG. 9 shows the dimensional parameters of the belt and the pulley. As illustrated, the teeth of the belt 91 and the pulley 92 are engaged with each other. In this case, the belt pitch line follows the position shown by the dotted line in the drawing and joins with the pulley pitch circle shown by the dashed line in the drawing. The pitch diameter is the radius of the pulley pitch circle, and the pitch is the arc length of the pulley pitch circle.

The procedure for making the belt drive system is as follows. FIG. 10 shows a processing flow of the belt model generation unit 5-2. First, parameters, coordinate values and the like are input to each input field of the input panel of the pulley as shown in the example of FIG. 5 to create a pulley model (step S1).
At this time, if the pulley type is designated, the number of input items can be reduced by using the belt pulley DB3 as described above. Next, the input pulley model is picked and designated by an input device such as a mouse (step S2). Then, when all the pulley models are designated, a belt model that is automatically closed for the designated pulley models is created by the automatic belt generation unit 5-2B (step S7). At that time, the connection information of the belt and the pulley is stored in the data storage unit 4. The direction in which the belt is stretched is determined by the position where the pulley is picked.

In such a process of the automatic belt generation unit, the belt is already stretched (step S3), and even when the double belt is stretched there, which belt is inside and which one is inside from the belt pulley angle. It is determined whether the belt is outside (steps S4 and S5), and as shown in FIG. 11, a double belt model is automatically generated (step S6). That is, the pulleys are arranged as shown in FIG.
As shown in FIG. 1 (b), it is assumed that the belt B1 is stretched first. Then, in this state, it is assumed that the belt B2 is further stretched as shown in FIG. Then, as shown in the figure, the belt B1 and the belt B2 overlap each other between the pulley P1 and the pulley P2. Therefore, this portion needs to be corrected as a double belt to the state as shown in FIG. However, this correction is automatically performed as described above. That is, the angle at which the belt B1 and the belt B2 bend at the portion of the pulley P1 and the pulley P2 is calculated from the connection information of the belt and the pulley. In the illustrated example, the bending angle of the belt B1 is larger than the bending angle of the belt B2. Therefore, it is inevitably determined that the belt B1 is an outer belt and the belt B2 is an inner belt. Therefore, the belt B1 and the belt B2
A double belt as shown in FIG. 11D is automatically generated by using the thickness of the double belt. Also, when you want to perform editing work such as moving, rotating, moving copy, rotating copy, etc. for the created belt model, there is a belt pulley interlocking batch editing processing unit 5-2C that performs editing in batch, so a new pulley is created It is not necessary to re-execute the above-mentioned procedure of setting up.

FIG. 12 shows a processing flow of the belt pulley interlocking batch processing section. First, the pulley to be changed is specified by picking it with a mouse or the like (step S11). This is done by picking, for example, the pulley P4 with a mouse or the like on the screen display as shown in FIG. Next, as shown in FIG. 14, the direction in which the pulley is moved is designated by an angle with the X coordinate axis direction as a reference, and the amount of movement is designated (step S12). As a result, the moved pulley P4 'is displayed as shown in FIG. At this time, it is prompted to confirm whether or not the movement is allowed (step S13), and after the confirmation, the movement is executed as shown in FIG. 16 (step S1).
4). By only making these inputs, the belt is automatically changed from the connection information of the belt B1 connected to the pulley P4 and the attributes of the belt B1. Further, even if the belt B1 is designated and is changed as shown in the drawing, the pulley P4 is automatically changed. In this way, since the editing work can be facilitated, the analysis model can be easily created and changed.

The belt analysis section 6-2 has various analysis functions related to belt design. In the belt analysis unit 6-2, as shown in FIG. 9 described above, the pitch diameter determined for each belt and pulley type is obtained based on the input outer diameter dimension of the pulley. Then, the arc length with that diameter and the respective lengths of the straight lines with the tangent line drawn to the circle of that diameter as the pitch line are summed up to calculate the belt length. In the belt total length calculation unit 6-2A, as shown in FIG. 17, by specifying the belt on the screen to be calculated by picking with a mouse or the like (step S31), the coordinate value and outer shape information of the pulley connected to the belt can be obtained. It is taken out from the data storage unit 4 (step S32), then the pitch thickness information is taken out from the belt pulley DB3, and the pulley pitch diameter and pitch line position are calculated (step S33). Then, the arc length and line segment length are calculated from the calculated positions (step S
34), the total length is obtained by adding all (step S35). With this function, it is possible to easily select the length of the belt.

The pulley movement calculation unit 6-2B has a function of moving the pulley according to the standard belt length. FIG.
First, as shown in FIG.
1), the moving direction θ (step S42), and the standard length of the belt to be moved are designated (step S43). Here, the total length calculation result of the designated belt is retrieved from the data storage unit. When the total length is not calculated, the total length is calculated according to the above-described total length calculation method shown in FIG. Then, the total length is compared with the standard length (step S44),
The pulley is moved by ΔX and ΔY in the θ direction according to the difference in length, and the center coordinate value of the pulley at that time is obtained (step S45). After that, the belt total length is obtained in the same manner as the belt total length calculation (step S46), and this calculation is repeated until the error range is predetermined with respect to the designated standard belt length (step S47).

As shown in FIG. 19, the belt section calculation unit 6-2C is for specifying the section to be calculated of the specified belt with a mouse or coordinate values and calculating the distance of the section. First, the belt to be calculated is specified (step S5
1), the belt section to be calculated is designated by the mouse or the coordinate value (step S52). Section distance calculation is
The coordinates of the designated belt cutting points A1 and A2 are obtained (step S53), and the rest of the calculation is almost the same as the calculation of the belt total length. The difference is that in this case, since the transported object moves (runs) along the outside of the belt, it is calculated as the diameter of the circle that is the pulley outer diameter plus the belt thickness and the length of the tangent line tangent to the circle. Points (step S54). With this function, it is possible to easily obtain the moving (traveling) distance of the conveyed object.

The belt winding tooth number calculating unit 6-2D is shown in FIG.
As shown in 0, the winding angle θ of the belt around the pulley and the number of winding teeth can be calculated. The number of winding teeth is also obtained from the arc length at the pitch diameter obtained from the winding angle calculated in the same manner as the total length calculation, and the tooth pitch determined for each belt type. In order to ensure stable driving and a sufficient belt life, it is necessary to secure a sufficient number of wound teeth, and in that case, it is possible to easily confirm them.

The results of these analyzes are shown in the belt result display section 7-
2 and is displayed on the display device 1 such as a CRT. Also, the model created here has accurate values of physical properties such as diameter, thickness, width, etc. as attributes, so it should be used to calculate the moment of inertia and friction torque when connected to a load analysis device. You can In addition, in the above-described embodiment, the case where the belt drive system is configured by combining the belt having the tooth portion and the pulley has been described, but the present invention is not limited to this, and the flat belt and the pulley having no tooth portion are described. It goes without saying that it can be applied to a system in which

[0026]

As described above, according to the present invention, since the belt driving system is automatically generated by inputting each parameter of the belt and the pulley from the database, the following excellent features are obtained. The effect is obtained. (1) Pulley and belt models according to belt type
It can be easily created by designating by parameter input. Further, by storing the attributes and connection information of the belts and pulleys, it is possible to change the model by changing the parameters and batch edit the belts and pulleys, and it is possible to easily change the created model. Furthermore, when the belt is double stretched, the double belt is automatically generated by determining which belt is the inner side and which belt is the outer side from the attribute and connection information of the belt and the pulley. It can be easily created. (2) It is possible to design a belt accurately and in a short time by providing a belt analysis function such as total belt length calculation, pulley movement, section distance calculation, and number of wound teeth calculation. (3) Since it is possible to create a model having an accurate shape or characteristic of a pulley or a belt as an attribute according to the belt type, the belt analysis model and the load characteristic analysis model can be shared. Therefore, since it is not necessary to re-input different models, it is possible to reduce the number of model creation steps.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a drive system analysis system of the present invention.

FIG. 2 is an explanatory diagram of a conventional belt length calculation method by manual calculation.

FIG. 3 is an explanatory diagram of a belt length calculation method by a conventional CAD system.

FIG. 4 is a block diagram showing an overall configuration of a drive system analysis system.

FIG. 5 is an explanatory diagram of an example of an input panel according to the present invention.

FIG. 6 is an explanatory diagram of an example of model generation of a drive system analysis system.

FIG. 7 is an explanatory diagram of an example of belt model generation according to the present invention.

FIG. 8 is an explanatory diagram of an example of a belt DB (database) according to the present invention.

FIG. 9 is an explanatory diagram of shape parameters of a belt and a pulley.

FIG. 10 is a flowchart illustrating a processing flow of a belt model generation unit.

FIG. 11 is an explanatory diagram of a double belt generation example by a belt model generation unit.

FIG. 12 is a flowchart illustrating a processing flow of a belt pulley interlocking batch edit processing unit.

FIG. 13 is an explanatory diagram of a moving procedure (part 1) of the pulley and the belt.

FIG. 14 is an explanatory diagram of a moving procedure (part 2) of the pulley and the belt.

FIG. 15 is an explanatory diagram of a moving procedure (part 3) of the pulley and the belt.

FIG. 16 is an explanatory diagram of a movement procedure (part 4) of the pulley and the belt.

FIG. 17 is an explanatory diagram of a processing procedure of belt total length calculation.

FIG. 18 is an explanatory diagram of a processing procedure of pulley movement calculation.

FIG. 19 is an explanatory diagram of a processing procedure of belt section calculation.

FIG. 20 is an explanatory diagram of a processing procedure for winding fraction calculation.

[Explanation of symbols]

 1 display device 2 input device 3 belt pulley DB 4 data storage unit 5-2 belt model generation unit 5-2A parameter input processing unit 5-2B automatic belt generation unit 5-3C belt pulley interlocking batch processing unit 6-2 belt analysis Section 7-2 Belt result display section

Claims (4)

[Claims] 1. A database that stores parameters that determine the shapes and materials of belts and pulleys, and a parameter input processing unit that inputs the parameters of each belt and pulleys that make up a belt drive system from the database, A drive system analysis comprising: a belt automatic generation unit that specifies the pulley that is input and arranged by a parameter input unit and automatically applies a belt to the specified pulley to generate a belt drive system. system. 2. A data storage unit that stores connection information indicating a connection state of a belt and a pulley, and when changing one of the belt and the pulley, the other of the belt and the pulley is used according to the connection information of the data storage unit. 2. The drive system analysis system according to claim 1, further comprising a belt pulley interlocking batch change processing unit that interlocks and changes. 3. The belt automatic generation unit, when an existing belt is present in the pulley, sets an angle at which each belt is bent by the pulley with respect to a pulley in which a double belt is applied by newly stretching the belt. The double belt drive system is generated by calculating the respective values and comparing the respective angles, using the belt having the smaller angle as the inner belt and the belt having the larger angle as the outer belt. The drive system analysis system described. 4. The drive system analysis system according to claim 1, further comprising a belt analysis unit that analyzes characteristics of the belt drive system using parameters of the belt and the pulley.